I don't believe what this woman is complaining about is relevant to the original article. Since time immemorial there have always been a subset of men who never settle down and "grow up". Perhaps the proportion has increased over the last forty years due to various social forces, but these vagabonds are no where near a majority.

I believe, rather, that this woman is suffering from opportunity costs for decisions she did not realize she was making at the time. She seems to know the type of mate she wants, which is more than most, though unfortunately for her what she wants went "off the market", for her at least, while she was in graduate school. She wants an educated, intelligent, supportive, successful, committed and sacrificing man in his thirties. These exists in sufficient abundance, it's merely that most of those men are either already in committed, long term relationships with people they met while in their twenties, or are not seeking a woman in her thirties with a settled career. Successful men in their thirties tend to be, by definition, successful and so most of them have already successfully found what they want at that moment, whether that's long term or non-committal.